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Triode/heptode frequency changer
Introduced in 1958
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| 1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
Base |
| g2,g4 |
g1h |
k,g5 |
f |
f |
ah |
g3,gt |
at |
f tap |
B9A |
The centre tapped heater
permits operation from either 6.3 or 12.6 volts, for AC and AC/DC
equipment
| |
Vf |
Af |
Va |
Vs |
Vg |
mAa |
ra |
gm |
Pdiss |
| Heptode |
12.6 |
0.15 |
250 |
100 |
-3 |
2.5 |
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Triode |
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150 |
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5.7 |
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3.6 |
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